title: How far down the duodenum?
mesh_terms: D000230:Adenocarcinoma / Q000473:pathology*; D000368:Aged; D004386:Duodenum / Q000473:pathology*; D006801:Humans; D008297:Male; D009361:Neoplasm Invasiveness; D013274:Stomach Neoplasms / Q000473:pathology*